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obligatory

see definition of obligatory
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Synonyms for obligatory

adj essential, required
  • compulsory
  • de rigueur
  • imperative
  • mandatory
  • requisite
  • unavoidable
  • binding
  • coercive
  • compulsatory
  • enforced
  • imperious
  • necessary

Antonyms for obligatory

  • free
  • optional
  • unnecessary
  • voluntary
  • nonessential
  • unrequired
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.
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